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Junior high school science and technology composition 1000 words _ junior high school science and technology composition 800 words second day
Scientific papers make scientific analysis, comprehensive research and exposition of natural science, which is a mythical analysis mode and does not involve content. The following is my 800-word junior high school science and technology paper. Thank you for reading.

I will be the mayor in the future. There are endless things to do in a day.

Dangdang Dangdang? The alarm clock rang at half past six. I changed my clothes and went out for breakfast. ? Master, please eat. ? Robot nanny said. I ate with relish. It's time to go to work before dinner is finished. I hurried to the office again.

Mayor, please sign your name. ? The secretary said to me. ? Sure! ? The secretary brought one document after another, reports and plans? Come on, let's eat! ? I only heard the staff outside say. I looked at the clock. Ah! It's twelve fifty. Eat quickly! ? Just as I was about to walk out of the office, a phone call came. ? Hello, mayor, please come to our stadium to cut the ribbon at 1: 30! ? Shan Li of the Municipal Sports Bureau said. ? Ok, ok, I will go! ?

Haven't stepped on it yet? Ding! Ding! Ding! ? Another call came in. ? Mayor, please attend the opening ceremony of our company. You must come at half past two. ? Many calls came in succession. I'm so busy that I have to go to every phone call. Oh, dear, doesn't this mean that we will be busy again in the afternoon? When I first thought of it, it was already one twenty. I got on the bus again and rushed to the gym at full speed!

Hardly had we arrived when the ribbon-cutting began. ? Let's invite the mayor and cadres to cut the ribbon! ? I dragged my tired body and inflated stomach again. Smile and say hello to everyone.

This activity has just ended, and there is another opening ceremony of a big company. I rushed to that company without stopping again. Just arrived? Let's welcome the mayor to say a few words for everyone. ? I didn't even take a sip of water and went on stage to tell the public a lot.

Finally, in the evening, after finishing what I was doing, I was exhausted and sat on the sofa with an empty stomach, because there was still half an hour before dinner. ? Ding! Ding! Ding! ? The phone rang and I answered it. I thought I was asked to do something again. ? Hello, mayor! I am your citizen. You broke your heart for our city. What you have done for us is vivid, you have made us rich, and you have made us live a happy life. I wish the mayor good health and happiness! ? After hearing these words, I seem to be full of strength and not tired at all.

I think: I will try my best to make this city more beautiful! Will not let the public down!

According to the astronauts who were lucky enough to fly into space, when they roamed the earth in the sky, they saw a crystal ball with blue and white lines and a layer of water blue around it? Gauze? . But who knows, what about this gem? Facing the resource crisis, there are few oil resources left, water resources are polluted, and the atmosphere is thin. In some places, the ozone layer even has holes, which are ruthlessly destroyed by the ultraviolet rays of the sun, and forest resources are greatly reduced, but people are still cutting down indiscriminately. Maybe you didn't hear, Mother Earth is moaning! The culprit is not others, but human beings, who exploit and destroy the earth's resources without restraint. Take oil as an example, it can only be used by us for fifty years! So people started? Protection? The earth's resources, adding ethanol (alcohol) to gasoline is a drop in the bucket, and if corn and other crops closely related to human beings are used in large quantities to make ethanol, ethanol itself is destroying nature.

Here, I recommend a new energy, solar energy, which is an inexhaustible green energy. People's scientific and technological level has been able to convert solar energy into electric energy, thermal energy and other forms of energy, and began to apply 800 words (6 articles) of science and technology. For example, the solar water heater we use is one of them.

Solar water heaters not only do not use and destroy the earth's resources, but also save time, effort and money! On a hot day, I was so tired that I wanted to take a bath, but at this time I let out cold tap water, which made you shiver and caught a cold. However, if you have a solar water heater, you can take a comfortable warm bath as soon as you get home to wash away your fatigue; Taking a hot bath is the most enjoyable thing in winter when the cold wind is howling. At this time, you only need to turn on the solar water heater, and the hot water will pour out and lie in the bathtub to enjoy your warmth!

Now solar cars have been invented. This kind of car does not need to burn gasoline, but relies on the solar panel on the roof to absorb sunlight, convert it into electric energy, store it, and then use the electric energy to drive the car. Absolutely environmental protection, no engine noise and exhaust gas. If you sit in it, just turn on the satellite navigation system, enter the destination, listen to the music and enjoy the scenery on the roadside, and it will send you an 800-word (6-article) scientific composition by the safest and quickest route.

Solar energy is environmentally friendly, green energy and the best energy I have ever seen. We must make good use of the precious solar energy that God has given us and make it make more contributions to mankind!

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